Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4997861 | Bioresource Technology | 2017 | 9 Pages |
Abstract
Effects of nitrogen electron acceptors on dimethyl sulfide (Me2S) and dimethyl disulfide (Me2SS) odor emission during composting was investigated. The chemicals and doses used included sodium nitrate (NO3â at 10Â mM, 20Â mM and 40Â mM), sodium nitrite (NO2â at 10Â mM, 20Â mM and 40Â mM) and sodium nitrite (10Â mM, 20Â mM and 40Â mM) with hexaammonium heptamolybdate tetrahydrate (HHT). The results showed that the addition of these chemicals restricted the emission of Me2S and Me2SS. The emission reduction effect of NO2â was greater than NO3â at the same dosage. A greater reduction was observed when HHT was also added. With 2Â mM HHTÂ +Â 40Â mM NO2â addition, the emission of Me2S and Me2SS was reduced by 92.3% and 82.3%, respectively. Comparison of compost maturity indices for treated and untreated composts indicated that none of the additives adversely affected compost quality. These results indicate that nitrogen chemical addition may provide an efficient method to control sulfur odors during composting.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Bing Zang, Shuyan Li, Frederick C. Michel, Guoxue Li, Difang Zhang, Yangyang Li,